1 files changed, 29 insertions, 6 deletions

diff --git a/include/linux/trace_seq.h b/include/linux/trace_seq.h
index 1ef95c0287f0..697d619aafdc 100644
--- a/include/linux/trace_seq.h
+++ b/include/linux/trace_seq.h
@@ -21,10 +21,10 @@
 	(sizeof(struct seq_buf) + sizeof(size_t) + sizeof(int)))
 
 struct trace_seq {
-	char			buffer[TRACE_SEQ_BUFFER_SIZE];
 	struct seq_buf		seq;
 	size_t			readpos;
 	int			full;
+	char                    buffer[TRACE_SEQ_BUFFER_SIZE];
 };
 
 static inline void
@@ -80,6 +80,19 @@ static inline bool trace_seq_has_overflowed(struct trace_seq *s)
 	return s->full || seq_buf_has_overflowed(&s->seq);
 }
 
+/**
+ * trace_seq_pop - pop off the last written character
+ * @s: trace sequence descriptor
+ *
+ * Removes the last written character to the trace_seq @s.
+ *
+ * Returns the last character or -1 if it is empty.
+ */
+static inline int trace_seq_pop(struct trace_seq *s)
+{
+	return seq_buf_pop(&s->seq);
+}
+
 /*
  * Currently only defined when tracing is enabled.
  */
@@ -88,8 +101,8 @@ extern __printf(2, 3)
 void trace_seq_printf(struct trace_seq *s, const char *fmt, ...);
 extern __printf(2, 0)
 void trace_seq_vprintf(struct trace_seq *s, const char *fmt, va_list args);
-extern void
-trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary);
+extern __printf(2, 0)
+void trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary);
 extern int trace_print_seq(struct seq_file *m, struct trace_seq *s);
 extern int trace_seq_to_user(struct trace_seq *s, char __user *ubuf,
 			     int cnt);
@@ -101,7 +114,11 @@ extern void trace_seq_putmem_hex(struct trace_seq *s, const void *mem,
 extern int trace_seq_path(struct trace_seq *s, const struct path *path);
 
 extern void trace_seq_bitmask(struct trace_seq *s, const unsigned long *maskp,
-			     int nmaskbits);
+			      int nmaskbits);
+
+extern void trace_seq_bitmask_list(struct trace_seq *s,
+				   const unsigned long *maskp,
+				   int nmaskbits);
 
 extern int trace_seq_hex_dump(struct trace_seq *s, const char *prefix_str,
 			      int prefix_type, int rowsize, int groupsize,
@@ -113,8 +130,8 @@ static inline __printf(2, 3)
 void trace_seq_printf(struct trace_seq *s, const char *fmt, ...)
 {
 }
-static inline void
-trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary)
+static inline __printf(2, 0)
+void trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary)
 {
 }
 
@@ -124,6 +141,12 @@ trace_seq_bitmask(struct trace_seq *s, const unsigned long *maskp,
 {
 }
 
+static inline void
+trace_seq_bitmask_list(struct trace_seq *s, const unsigned long *maskp,
+		       int nmaskbits)
+{
+}
+
 static inline int trace_print_seq(struct seq_file *m, struct trace_seq *s)
 {
 	return 0;